content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.observable.internal.operators;
  
  import static org.junit.Assert.*;
  
  import java.util.List;
  import java.util.concurrent.Callable;
  
  import org.junit.Test;
  
  import io.reactivex.common.*;
  import io.reactivex.common.exceptions.*;
  import io.reactivex.common.functions.*;
  import io.reactivex.observable.*;
  import io.reactivex.observable.observers.TestObserver;
  import io.reactivex.observable.subjects.PublishSubject;
  
  public class MaybeUsingTest {
  
      @Test
      public void resourceSupplierThrows() {
  
          Maybe.using(new Callable<Object>() {
              @Override
              public Object call() throws Exception {
                  throw new TestException();
              }
          }, new Function<Object, MaybeSource<Integer>>() {
              @Override
              public MaybeSource<Integer> apply(Object v) throws Exception {
                  return Maybe.just(1);
              }
          }, new Consumer<Object>() {
              @Override
              public void accept(Object d) throws Exception {
  
              }
          })
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void errorEager() {
  
          Maybe.using(new Callable<Object>() {
              @Override
              public Object call() throws Exception {
                  return 1;
              }
          }, new Function<Object, MaybeSource<Integer>>() {
              @Override
              public MaybeSource<Integer> apply(Object v) throws Exception {
                  return Maybe.error(new TestException());
              }
          }, new Consumer<Object>() {
              @Override
              public void accept(Object d) throws Exception {
  
              }
          }, true)
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void emptyEager() {
  
          Maybe.using(new Callable<Object>() {
              @Override
              public Object call() throws Exception {
                  return 1;
              }
          }, new Function<Object, MaybeSource<Integer>>() {
              @Override
              public MaybeSource<Integer> apply(Object v) throws Exception {
                  return Maybe.empty();
              }
          }, new Consumer<Object>() {
              @Override
              public void accept(Object d) throws Exception {
  
              }
          }, true)
          .test()
          .assertResult();
      }
  
      @Test
      public void errorNonEager() {
  
          Maybe.using(new Callable<Object>() {
              @Override
              public Object call() throws Exception {
                  return 1;
              }
          }, new Function<Object, MaybeSource<Integer>>() {
              @Override
              public MaybeSource<Integer> apply(Object v) throws Exception {
                  return Maybe.error(new TestException());
              }
          }, new Consumer<Object>() {
              @Override
              public void accept(Object d) throws Exception {
  
              }
          }, false)
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void emptyNonEager() {
  
          Maybe.using(new Callable<Object>() {
              @Override
              public Object call() throws Exception {
                  return 1;
              }
          }, new Function<Object, MaybeSource<Integer>>() {
              @Override
              public MaybeSource<Integer> apply(Object v) throws Exception {
                  return Maybe.empty();
              }
          }, new Consumer<Object>() {
              @Override
              public void accept(Object d) throws Exception {
  
              }
          }, false)
          .test()
          .assertResult();
      }
  
      @Test
      public void supplierCrashEager() {
  
          Maybe.using(new Callable<Object>() {
              @Override
              public Object call() throws Exception {
                  return 1;
              }
          }, new Function<Object, MaybeSource<Integer>>() {
              @Override
              public MaybeSource<Integer> apply(Object v) throws Exception {
                  throw new TestException();
              }
          }, new Consumer<Object>() {
              @Override
              public void accept(Object d) throws Exception {
  
              }
          }, true)
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void supplierCrashNonEager() {
  
          Maybe.using(new Callable<Object>() {
              @Override
              public Object call() throws Exception {
                  return 1;
              }
          }, new Function<Object, MaybeSource<Integer>>() {
              @Override
              public MaybeSource<Integer> apply(Object v) throws Exception {
                  throw new TestException();
              }
          }, new Consumer<Object>() {
              @Override
              public void accept(Object d) throws Exception {
  
              }
          }, false)
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void supplierAndDisposerCrashEager() {
          TestObserver<Integer> to = Maybe.using(new Callable<Object>() {
              @Override
              public Object call() throws Exception {
                  return 1;
              }
          }, new Function<Object, MaybeSource<Integer>>() {
              @Override
              public MaybeSource<Integer> apply(Object v) throws Exception {
                  throw new TestException("Main");
              }
          }, new Consumer<Object>() {
              @Override
              public void accept(Object d) throws Exception {
                  throw new TestException("Disposer");
              }
          }, true)
          .test()
          .assertFailure(CompositeException.class);
  
          List<Throwable> list = TestCommonHelper.compositeList(to.errors().get(0));
  
          TestCommonHelper.assertError(list, 0, TestException.class, "Main");
          TestCommonHelper.assertError(list, 1, TestException.class, "Disposer");
      }
  
      @Test
      public void supplierAndDisposerCrashNonEager() {
          List<Throwable> errors = TestCommonHelper.trackPluginErrors();
          try {
              Maybe.using(new Callable<Object>() {
                  @Override
                  public Object call() throws Exception {
                      return 1;
                  }
              }, new Function<Object, MaybeSource<Integer>>() {
                  @Override
                  public MaybeSource<Integer> apply(Object v) throws Exception {
                      throw new TestException("Main");
                  }
              }, new Consumer<Object>() {
                  @Override
                  public void accept(Object d) throws Exception {
                      throw new TestException("Disposer");
                  }
              }, false)
              .test()
              .assertFailureAndMessage(TestException.class, "Main");
  
              TestCommonHelper.assertUndeliverable(errors, 0, TestException.class, "Disposer");
          } finally {
              RxJavaCommonPlugins.reset();
          }
      }
  
      @Test
      public void dispose() {
          final int[] call = {0 };
  
          TestObserver<Integer> to = Maybe.using(new Callable<Object>() {
              @Override
              public Object call() throws Exception {
                  return 1;
              }
          }, new Function<Object, MaybeSource<Integer>>() {
              @Override
              public MaybeSource<Integer> apply(Object v) throws Exception {
                  return Maybe.never();
              }
          }, new Consumer<Object>() {
              @Override
              public void accept(Object d) throws Exception {
                  call[0]++;
              }
          }, false)
          .test();
  
          to.cancel();
  
          assertEquals(1, call[0]);
      }
  
      @Test
      public void disposeCrashes() {
          List<Throwable> errors = TestCommonHelper.trackPluginErrors();
          try {
              TestObserver<Integer> to = Maybe.using(new Callable<Object>() {
                  @Override
                  public Object call() throws Exception {
                      return 1;
                  }
              }, new Function<Object, MaybeSource<Integer>>() {
                  @Override
                  public MaybeSource<Integer> apply(Object v) throws Exception {
                      return Maybe.never();
                  }
              }, new Consumer<Object>() {
                  @Override
                  public void accept(Object d) throws Exception {
                      throw new TestException();
                  }
              }, false)
              .test();
  
              to.cancel();
  
              TestCommonHelper.assertUndeliverable(errors, 0, TestException.class);
          } finally {
              RxJavaCommonPlugins.reset();
          }
      }
  
      @Test
      public void isDisposed() {
          TestHelper.checkDisposed(Maybe.using(new Callable<Object>() {
                  @Override
                  public Object call() throws Exception {
                      return 1;
                  }
              }, new Function<Object, MaybeSource<Integer>>() {
                  @Override
                  public MaybeSource<Integer> apply(Object v) throws Exception {
                      return Maybe.never();
                  }
              }, new Consumer<Object>() {
                  @Override
                  public void accept(Object d) throws Exception {
  
                  }
              }, false));
      }
  
      @Test
      public void justDisposerCrashes() {
          Maybe.using(new Callable<Object>() {
              @Override
              public Object call() throws Exception {
                  return 1;
              }
          }, new Function<Object, MaybeSource<Integer>>() {
              @Override
              public MaybeSource<Integer> apply(Object v) throws Exception {
                  return Maybe.just(1);
              }
          }, new Consumer<Object>() {
              @Override
              public void accept(Object d) throws Exception {
                  throw new TestException("Disposer");
              }
          }, true)
          .test()
          .assertFailure(TestException.class);
      }
  
  
      @Test
      public void emptyDisposerCrashes() {
          Maybe.using(new Callable<Object>() {
              @Override
              public Object call() throws Exception {
                  return 1;
              }
          }, new Function<Object, MaybeSource<Integer>>() {
              @Override
              public MaybeSource<Integer> apply(Object v) throws Exception {
                  return Maybe.empty();
              }
          }, new Consumer<Object>() {
              @Override
              public void accept(Object d) throws Exception {
                  throw new TestException("Disposer");
              }
          }, true)
          .test()
          .assertFailure(TestException.class);
      }
  
      @Test
      public void errorDisposerCrash() {
          TestObserver<Integer> to = Maybe.using(new Callable<Object>() {
              @Override
              public Object call() throws Exception {
                  return 1;
              }
          }, new Function<Object, MaybeSource<Integer>>() {
              @Override
              public MaybeSource<Integer> apply(Object v) throws Exception {
                  return Maybe.error(new TestException("Main"));
              }
          }, new Consumer<Object>() {
              @Override
              public void accept(Object d) throws Exception {
                  throw new TestException("Disposer");
              }
          }, true)
          .test()
          .assertFailure(CompositeException.class);
  
          List<Throwable> list = TestCommonHelper.compositeList(to.errors().get(0));
  
          TestCommonHelper.assertError(list, 0, TestException.class, "Main");
          TestCommonHelper.assertError(list, 1, TestException.class, "Disposer");
      }
  
      @Test
      public void doubleOnSubscribe() {
          List<Throwable> errors = TestCommonHelper.trackPluginErrors();
          try {
              Maybe.using(new Callable<Object>() {
                  @Override
                  public Object call() throws Exception {
                      return 1;
                  }
              }, new Function<Object, MaybeSource<Integer>>() {
                  @Override
                  public MaybeSource<Integer> apply(Object v) throws Exception {
                      return Maybe.wrap(new MaybeSource<Integer>() {
                          @Override
                          public void subscribe(MaybeObserver<? super Integer> s) {
                              Disposable d1 = Disposables.empty();
  
                              s.onSubscribe(d1);
  
                              Disposable d2 = Disposables.empty();
  
                              s.onSubscribe(d2);
  
                              assertFalse(d1.isDisposed());
  
                              assertTrue(d2.isDisposed());
                          }
                      });
                  }
              }, new Consumer<Object>() {
                  @Override
                  public void accept(Object d) throws Exception {
  
                  }
              }, false).test();
              TestCommonHelper.assertError(errors, 0, IllegalStateException.class, "Disposable already set!");
          } finally {
              RxJavaCommonPlugins.reset();
          }
      }
  
      @Test
      public void successDisposeRace() {
          for (int i = 0; i < 500; i++) {
  
              final PublishSubject<Integer> ps = PublishSubject.create();
  
              final TestObserver<Integer> to = Maybe.using(new Callable<Object>() {
                  @Override
                  public Object call() throws Exception {
                      return 1;
                  }
              }, new Function<Object, MaybeSource<Integer>>() {
                  @Override
                  public MaybeSource<Integer> apply(Object v) throws Exception {
                      return ps.lastElement();
                  }
              }, new Consumer<Object>() {
                  @Override
                  public void accept(Object d) throws Exception {
                  }
              }, true)
              .test();
  
              ps.onNext(1);
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      to.cancel();
                  }
              };
  
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      ps.onComplete();
                  }
              };
  
              TestCommonHelper.race(r1, r2, Schedulers.single());
          }
      }
  
      @Test
      public void errorDisposeRace() {
          for (int i = 0; i < 500; i++) {
  
              final PublishSubject<Integer> ps = PublishSubject.create();
  
              final TestObserver<Integer> to = Maybe.using(new Callable<Object>() {
                  @Override
                  public Object call() throws Exception {
                      return 1;
                  }
              }, new Function<Object, MaybeSource<Integer>>() {
                  @Override
                  public MaybeSource<Integer> apply(Object v) throws Exception {
                      return ps.firstElement();
                  }
              }, new Consumer<Object>() {
                  @Override
                  public void accept(Object d) throws Exception {
                  }
              }, true)
              .test();
  
              final TestException ex = new TestException();
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      to.cancel();
                  }
              };
  
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      ps.onError(ex);
                  }
              };
  
              TestCommonHelper.race(r1, r2, Schedulers.single());
          }
      }
  
      @Test
      public void emptyDisposeRace() {
          for (int i = 0; i < 500; i++) {
  
              final PublishSubject<Integer> ps = PublishSubject.create();
  
              final TestObserver<Integer> to = Maybe.using(new Callable<Object>() {
                  @Override
                  public Object call() throws Exception {
                      return 1;
                  }
              }, new Function<Object, MaybeSource<Integer>>() {
                  @Override
                  public MaybeSource<Integer> apply(Object v) throws Exception {
                      return ps.firstElement();
                  }
              }, new Consumer<Object>() {
                  @Override
                  public void accept(Object d) throws Exception {
  
                  }
              }, true)
              .test();
  
              Runnable r1 = new Runnable() {
                  @Override
                  public void run() {
                      to.cancel();
                  }
              };
  
              Runnable r2 = new Runnable() {
                  @Override
                  public void run() {
                      ps.onComplete();
                  }
              };
  
              TestCommonHelper.race(r1, r2, Schedulers.single());
          }
      }
  }
  